Method of splicing solid-tire stocks



March 1927' I e. w. SEIBERLING METHOD OF SPLICING SOLID TIRE STOCKS Filed June 11. 1925 GEORGE W. 5IBRU-6 Patented Mar. 29,1927. UNITED STATES PATENT OFFICE.

GEORGE W. SEIBERLING, OF DETROIT, MICHIGAN, ASSIGNOR TO MORGAN & WRIGHT,

. OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

METHOD OF SPLICING SOLID-TIRE STOCKS.

Application filed June 11, 1925. Serial No. 36,336.

This invention relates to methods of disposition of this face relative to the top manufacturing solid tires for vehicles, but and bottom faces of the slab. A joint promore particularly to improvements in the vided by either of these bevels is the weak method of splicing solid tire stock upon a point in the tire and it frequently happens metal rim, and has for its primary object to that this joint. opens imn'iediately after vulon secure a well knit joint between the ends of canization. the stock. I have devised an improved method of Further objects of my invention are to cutting the stock which provides a well knit eliminate opening of the splice after vulcanjoint and very materially facilitates the ization, to increase the contact area at the splicing operation. This consists in cutting 65 splice, to confine the effect of the presser roll t e stock in a combined transverse and ion to a comparatively small area in the spliced gitudinal bevel as distinguished from either portion at any instant, and in general to of these separately. The term combined provide an improved method of making transverse and longitudinal bevel indicates solid tires. a out which is oblique to the sides and to 70 The many other objects and advantages the top and bottom faces of the strip or slab. of my invention will be better understood Referring to the drawing, the slab of stock by reference to the following specification 5 has been cut from a tubed strip by my imwhen considered in connection with the acproved method and the end faces (3 and 7 of companying drawing illustrating a selected the slab have the combined transverse and 7 embodiment thereof, in which: longitudinal bevel, the bevels being reversed Fig. -1 is an elevation of a completed tire at the opposite ends so that these ends will manufactured in accordance with the prinfit together when the slab is placed upon the ciples of my invention; rim. The form of the joint is shown in Fig.

F ig. 2 is a side elevation of a slab of stock 1 of the drawings. The cut slab is applied 80 cut from the strip and ready to be placed to the rim in the manner indicated in Fig. 4. upon a metal rim; After the slab has been placed upon the Fig. 3 is a plan view of the slab shown in rim in the manner described, it is customary Fig. 2; i to apply pressure to the periphery of the Fig. 4 illustrates the method of placing slab by means of a roller as 8 though other the cut slab upon the rim; and means of manipulation are sometimes used. Fig. 5 is a transverse section on the line The tire is ievolved so that the roller con- 55 of Fig. 1. tacts with all portions of the circumference.

One method of making solid tires consists The pressure applied in this manner has a in first tubing the uncured stock in a 'conprogressive action at the splice which tends tinuous strip having substantially the same to knit the splice firmly because the effect of cross-section as the finished tire and then the pressure roll is confined to a comparacutting the strip into slabs of predetermined tively small portion of the area in the splice length. These slabs are carefully weighed at any instant. in order to get the proper amount of stock With my improved form of bevel the conin the tire. The slab is then applied to a tacting area at the splice is considerably rim and the ends spliced together to form a larger than would be the case if the skive or complete annulus. The uncured tire thus bevel was either transverse or longitudinal. formed is next delivered to amold and vul- This is a ver advantageous feature. Furcanized. i thermore in t 1e case of the transverse bevel It is customary in practice to cut the stock alone, the pressure of the roll has very little in a manner to provide beveled or skived effect in setting the splice together. When ends on the slab and this is primarily for the ends of the stock are beveled longitudithe purpose of facilitating the splicing of nally only, the progressive action of the these ends when the slab is placed upon a presser roll is distributed throu h the width rim. This bevel has heretofore been either of the tread stock and this ten to cause a transverse or longitudinal. By transverse sliding action between the contacting ends bowl is meant an oblique disposition of the which does not provide a firm splice such as end face. of the slab relative to the sides is secured with my improved bevel. 55 thereof, and by longitudinal bevel, a like While I prefer to tube the stock and cut the slabs therefrom in the manner described, it is obvious that these slabs may be produced in a variety ofedifterent ways.

It will be evident from the foregoing description that my improved method of manufacturing solid tires is simple and economical and the finished tire is capable of standing the rough usage in service.

Having thus described my invention, what it claim and desire to protect by Letters Patent is:

1. The method of preparing stock for the making of solid tires which consists in tubing the stock in a continuous strip and severing the strip at predetermined longitudinal intervals by cuts directed to form a combined transverse and longitudinal bevel on the cut edges of the-severed sections.

2. he method of preparing uncured rubber stock'l'or the making of solid tires which consists in tubing the stock in a continuous strip having substantially the cross section of the tire, and severing the strip at predetermined longitudinal intervals, by cuts directed to form a combined transverse and longitudinal bevel on the cut edges of the severed sections.

3. The method of making a solid tire which consists in tubing uncured stock in a continuous strip, sever1ng the strip at predetermined longitudinal intervals by cuts form combined transverse an out edges of the directed to longitudinal bevels on the severed sections or slabs, placing the slab over a rim with said out edges abutting, joining said abutting edges to form a complete annulus, and vulcanizing.

4. The method of making solid tlres which consists in tubing uncured stock in a continuous strip, severing the strip at predetermined longitudinal intervals by cuts directed to form combined transverse and longitudinal bevels on the cut edges of the severed sections or slabs, placing the slab on a rim and splicing said cut edges to form a complete annulus, and then placing the tire in a mold and vulcanizing.

5. The method of making solid tires which consists in tubing uncured stock in a continuous strip having substantially the cross-section of a finished tire, severing the strip at predetermined longitudinal intervals by cuts directed to form combined transverse and longitudinal bevels on the cut edges of the severed sections or slabs, placing one of these slabs upon a rim with the opposite cut edges of the slab in contact, manipulatin the slab to close the joint between said edges, and vulcanizing.

6. The method of making solid tires which consists in tubing uncured stock in a continuous strip having substantially the crosssection of the finished tire, severing the strip at predetermined longitudinal intervals by cuts directed to form combined transverse and longitudinal bevels on the cut edges of the severed sections or slabs, placing one of the severed slabs about a substantially rigid rim with the opposite cut edges of the slab abutting, subjectin the slab to pressure to cause the same to it ti htly about the rim and to close the joint Tetween said edges, and vulcanizing.

7. The method of making solid tires which consists in forming uncured rubber compound into an elongated slab having each of its ends transversely and longitudinally beveled, the bevel being reversed at the opposite ends, placing the slab about a substantially rigid rim and splicing the ends to form a com lete annulus, and vulcanizing.

Siifned at etroit, county of Wayne, State of ichigan, this 5th day of une, 1925.

GEORGE W. SEIBERLING. 

